Btw, try this first.
1) Go to the android market place and download the update. It says it's 4.0.12 but really, it's a newer version.
2) Log into your multiplayer account. You will probably get a message that says "REG" or "Upgrade". Hit ok and ignore it. It's something I added to the server to tell your application that you've already paid and make some internal changes.
3) Try again going into your multiplayer again. It should work now and next time you reboot the game the "upgrade" button should be gone.
Let me know if that did the trick, otherwise shoot me an email with your account name or registered email and I'll help you out from there.